by HomeRacingWorld » Wed Jul 10, 2013 11:46 am
Nothing much.
Commercial track wood guides are just larger and have different mounting. Mostly they are deeper and need a slot at least 1/4 inch or deeper.
Plastic tracks like Carrera accept "wood guides" as well as other brands, but sometimes the require some trimming.
Using other guides like Slot.it and Sloting plus are the best options for plastic. They need little if any trimming or sanding.
Keep in mind that if you have VERY tight radius corners or are using older track systems like SCX/Scalextric classic, most of them are too deep. Once you sand them you might as well left the old ones in place.
The main benefit of changing the guide is eliminating the "slop" or freeplay most RTR models have. A deeper and longer blade is of course an improvement, but having it stable is the key to better operation.